Jun Chul-Ho, Koo Bon-Tak, Kang Jung-Bu
1994
Citations
0
Influential Citations
3
Citations
Journal
Bulletin of The Korean Chemical Society
Abstract
Chlorobis(isoprene)rhodium(Ⅰ) (3), prepared by olefin-exchange reaction of chlorobis(cyclooctene)rhodium dimer (2) with isoprene, reacted with benzaldimine 4 to give iminoacylrhodium(Ⅲ) -1,2-dimethylallyl complex 6. Ligand-promoted reductive elimination of 6 by pyridine and P(OMe) produced -unsaturated ketimine 8, which was readily hydrolyzed to give -unsaturated ketone 9. Other methyl branched dienes such as 2,3-dimethylbutadiene, 3-methyl-1,3-pentadiene, 2-methyl-1,3-pentadiene, 2,4-dimethyl-1,3-pentadiene, 3-methyl-1,4-pentadiene and 2-methyl-1,4-pentadiene, were applied the synthesis of -unsaturated ketones. In case of 2,4-dimethyl-1,3-pentadiene, only -unsaturated ketone 25, 1,2-addition product, was obtained, may be due to the mono-olefin coordination.